Hinged device

ABSTRACT

The description relates to devices, such as computing devices that have hinged portions. One example can include a first portion that includes a first display and a second portion that includes a second display. This example can also include a determinative hinge assembly that rotatably secures the first and second portions around first and second hinge axes. The determinative hinge assembly can have a first unflexed configuration when the first and second portions are parallel or perpendicular to one another and a second flexed configuration when the first and second portions contact one another when oriented at an oblique angle.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate implementations of the concepts conveyed in the present document. Features of the illustrated implementations can be more readily understood by reference to the following description taken in conjunction with the accompanying drawings. Like reference numbers in the various drawings are used wherever feasible to indicate like elements. Further, the left-most numeral of each reference number conveys the FIG. and associated discussion where the reference number is first introduced.

FIGS. 1A, 1B, 1C, 2A, 4A, 5A, 6A, 7A, 8A, 9A, and 10A show perspective views of example devices in accordance with some implementations of the present concepts.

FIG. 2B shows an exploded perspective view of an example device in accordance with some implementations of the present concepts.

FIGS. 3A-3D, 4C, 4D, 5C, 5D, 6C, 6D, 7C, 7D, 8C, 8D, 9C, 9D, 10C, and 10D show sectional views of example devices in accordance with some implementations of the present concepts.

FIGS. 4B, 5B, 6B, 7B, 8B, 9B, and 10B show elevational views of example devices in accordance with some implementations of the present concepts.

DETAILED DESCRIPTION

The present concepts relate to devices, such as computing devices employing determinative hinge assemblies that can rotationally secure first and second device portions relative to a first hinge axis that relates to the first portion and a second hinge axis that relates to the second portion. The determinative hinge assembly can define which angles of rotation occur relative to which hinge axis. For instance, 0 to 90 degree rotation may occur around one of the hinge axes, 91-270 degrees may occur around the other hinge axis, and 271 to 360 may occur around the former hinge axis, for example. Traditionally, at certain angles of rotation, the first and second portions might contact one another. This contact can damage elements of either or both of the first and second portions. The determinative hinge assembly can solve this issue by allowing the first and second portions to move away from one another during this contact to lessen forces imparted on the first and second portions (e.g., the determinative hinge assembly can function as the compliant member in the system). The determinative hinge assembly can accomplish this movement with a force-relief sub-assembly. The force-relief sub-assembly can flex in a manner that allows the first and second portions to move slightly away from one another proximate to the hinge axis during contact and to return when contact ceases.

Introductory FIGS. 1A-1C show an example device 100 in a use case scenario. The device 100 can have first and second portions 102 and 104 that are rotatably secured together by a determinative hinge assembly 106 (indicated generally in FIGS. 1A and 1B and shown in cut-away in FIG. 1C). The first portion 102 can extend from a hinge end 108 to a distal end 110. The second portion 104 also can extend from a hinge end 112 to a distal end 114. The determinative hinge assembly 106 can define two hinge axes (e.g., axes of rotation) 116. The first portion 102 can rotate around first hinge axis 116(1) and the second portion 104 can rotate around second hinge axis 116(2). The determinative nature of the determinative hinge assembly 106 can control the relative order of rotation around the two hinge axes 116(1) and 116(2). Stated another way, given a range of rotation (e.g., set of angles) of the first and second portions, the determinative hinge assembly can define sub-ranges of rotation (e.g., individual angles) where rotation occurs around a specific hinge axis.

The first portion 102 can include opposing first and second surfaces 118 and 120, which can be parallel to one another. Similarly, the second portion 104 can include opposing first and second surfaces 122 and 124, which can be parallel to one another. In some implementations the first and/or second surfaces 118, 122, 120, and/or 124 can be planar surfaces. In some implementations, displays 126 can be positioned on the first and/or second surfaces. In this case, displays 126(1) and 126(2) are positioned on first surfaces 118 and 122, respectively.

As mentioned, FIGS. 1A-1C collectively show a use case scenario of device 100. FIG. 1A starts with device 100 in the closed orientation where the first and second portions 102 and 104 are positioned against one another and are rotatably secured by determinative hinge assembly 106. In this case, the second surfaces are facing outwardly with the first portion's second surface 120 facing the reader and the first surfaces (designated in FIG. 1B) facing inwardly. The closed orientation can be very compact and easy for a user 128 to transport. For instance, the device may fit in the user's pocket. Further, the first surfaces can be protected in this closed orientation by the second surfaces. The device can be biased to maintain this orientation until acted upon by the user. At this point user 128 is starting to open the device 100 (e.g., rotate the device portions 102 and 104 away from one another).

FIG. 1B shows the device 100 opened to an angle defined between the first and second portions 102 and 104 of about 110 degrees. This orientation can be thought of as a ‘notebook’ or ‘laptop’ orientation. The notebook orientation can be manifest as an angle in a range from about 90 degrees to about 150 degrees. In this case, the device portions 102 and 104 are configured to maintain this relative orientation while the user uses the device. In this example, video content is presented on a graphical user interface (GUI) 130(1) on display 126(1) of the first portion 102 and a virtual keyboard is presented on a GUI 130(2) on display 126(2) on second portion 104. The user can control GUI 130(1) via the virtual keyboard of GUI 130(2).

FIG. 1C shows the device 100 rotated until the relative angle is about 180 degrees between the first and second portions 102 and 104. In this orientation, a single GUI 130(3) can be presented collectively across displays 126(1) and 126(2). This GUI 130(3) offers basically twice the display area of either device portion 102 or 104. The GUI 130(3) can be more pleasing to the user when the first and second portions abut one another to make the GUI nearly seamless between the two displays 126(1) and 126(2). When not in use, the user can close the device 100 to a compact easy to carry configuration (e.g., see FIG. 1A) that protects the displays 126 from damage.

Note that while obscured by the displays 126, several electronic components, such as circuit boards, processors, and/or storage/memory can be secured to the first and second portions 102 and/or 104.

The processor can generate the GUIs 130 for presentation on the displays 126. In some implementations, the processor may generate different GUIs for the displays when the first and second portions 102 and 104 are in some orientations and a single GUI for a combined presentation in other orientations. For instance, when the first and second portions are oriented at 90 degrees relative to one another, the processor may generate a first GUI for presentation on the first portion and a second GUI for presentation on the second portion. When the first and second portions are oriented to 180 degrees, the processor can generate a single GUI that is collectively presented across both displays to create a larger display area. In other orientations, such as the alarm clock orientation, the same GUI may be presented on both the first and second portions. For instance, the time could be presented on both portions so that it is visible from more positions around the device. Thus, the processor can control the GUIs based upon the relative angle of the first and second portions.

Stated another way, in some configurations, the first surfaces 118 and 122 can be manifest as displays 126, such that in the open-book orientation of FIG. 1C the displays can work cooperatively to create a larger (e.g., 2 x) display area. In some cases, the second surfaces 120 and 124 can be manifest as protective covers so that in the orientation of FIG. 1A the protective covers protect the displays of the first surfaces. In other configurations, both the first and second surfaces can include displays, or neither can include displays.

FIGS. 2A and 2B show more details of example determinative hinge assembly 106. Determinative hinge assembly 106 can rotate a first body 202 and a second body 204 about axes of rotation (e.g., hinge axes) 116. In some implementations, the first body 202 and the second body 204 may be brackets configured to attach to first and second portions 102 and 104 (FIGS. 1A and 1B), respectively. In other implementations, the first body 202 may be a part of the first portion 102 and the second body 204 may part of second portion 104.

Axis of rotation (e.g., hinge axes) 116(1) can be defined by a hinge pin 206(1) associated with a communication member 208 and axis of rotation 116(2) can be defined by another hinge pin 206(2). The communication member 208 can also be associated with a cover 210.

In some implementations, rotation around the first hinge axis 116(1) and/or the second hinge axis 116(2) may be selectively locked and unlocked, such as by the use of sliders 212 and associated followers 214. In this case, followers 214(1) and 214(2) are positioned on slider 212(1) and follower 214(3) is positioned on slider 212(2).

The determinative hinge assembly 106 may include cams 216 associated with the first body 202 and/or the second body 204. In this example, first and second cams 216(1) and 216(3) are located on the first body 202 and third and fourth cams 216(2) and 216(4) are located on the second body 204. The cams 216 may have a pattern of low areas and/or high areas to allow or urge an individual follower 214 to move relative to an individual hinge pin 206 during rotation of the determinant hinge assembly 106. This aspect is described in more detail below relative to FIGS. 3A-3D. In some implementations, the opposing cams may act directly on one another to lock and unlock rotation around individual hinge axes 116. In other implementations, the cams can act upon an interposed element, such as the followers 214 employed in the illustrated implementation. In this configuration interaction of the cams and the followers can lock and unlock rotation around individual hinge axes.

In this implementation, sliders 212 can includes apertures 218 through which the hinge pins 206 can pass. In the illustrated configuration hinge pin 206(1) passes through aperture 218(1) in slider 212(1) and aperture 218(3) in slider 212(2). Similarly, hinge pin 206(2) passes through aperture 218(2) in slider 212(1) and aperture 218(4) in slider 212(2).

Individual apertures 218 can be elongate such that a width W of the aperture is approximately equal or slightly larger than a diameter D of the received hinge pin 206 while a length L of the aperture is substantially greater than the hinge pin diameter. (In order to reduce clutter on the drawing page, the diameter D, length L, and width W are labeled in only one instance on the drawing page of FIG. 2B). Thus, the apertures 218 can be elongated in a direction to allow the movement of the sliders 212 relative to the hinge pins 206. The extent of movement of the sliders 212 relative to the hinge pins 206 can be at least partially related to the aperture length L. For example, the amount of movement (e.g. stroke) of the sliders 212 (and hence, any followers 214 connected thereto) may be the difference between the aperture length L and the diameter D of the hinge pins 206. In other implementations, the stroke of the sliders can be determined by the cam rise and fall between the two halves of the hinge. The width of the apertures can be slightly larger than the diameter of the hinge pins that go through the apertures. This ensures a single degree of translational freedom for the sliders 212. Note that in the illustrated implementation the apertures 218 have approximately equal lengths. In other implementations, the apertures 218(1) and 218(2) of the slider 212(1) can be different lengths from apertures 218(3) and 218(4) of slider 212(2).

The determinative hinge assembly 106 can further include a force relief sub-assembly 220. In this example, the force relief sub-assembly is manifest as a flexible member 222. The flexible member can be secured between the hinge assembly and either the first and/or second portions 102 and/or 104. In the illustrated configuration, the flexible member 222 is secured between the first body 202 and the first portion 102. In this case, flexible member 222 extends between a first end 224 and a second end 226. The first end 224 of the flexible member is secured to the first body 202 with a threaded fastener 228(1) and to the first portion 102 with threaded fasteners 228(2) and 228(3). Threaded fasteners 228(4) and 228(5) secure the hinge assembly's second body 204 to the second portion 104. Other elements for securing the elements are contemplated.

Note that in the illustrated implementation, the first portion 102 is secured to the first body 202 and cam 216(1) indirectly through the flexible member 222. As such, hinge end 108 of the first portion 102 can move relative to the first body 202 during rotation of the first and second portions 102 and 104. The force relief sub-assembly 220 can be configured to give if/when the first portion 102 contacts the second portion 104 during rotation. In the illustrated configuration, the ‘giving’ of the force relief sub-assembly can be accomplished by flexing of the flexible member between the first end 224 and the second end 226. The flexion can reduce forces experienced by the first and second portions 102 and 104 that could damage sensitive elements. For instance, displays 126 on the first and second portions could contact one another during specific angular rotations. The flexible member 222 can flex to reduce and/or prevent damage, such as cracking of the displays. This flexion aspect is described in more detail below relative to FIGS. 4A-10D.

In some implementations, a communication member 208 may have one or more wires and/or cables extending therethrough, or, in other implementations, provides a direct electrical contact through which the determinative hinge assembly 106 may have electrical communication between the first portion 102 and second portion 104, or electronic components connected thereto. Data and/or electrical communication through the communication member 208 may allow electricity and/or data to be sent across the determinative hinge assembly 106 between, for example, a display 126 (FIG. 1B) connected to the first portion 102 and one or more computing components connected to the second portion 104. In some implementations, the communication member 208 provides electrical communication. In some implementations, the communication member 208 provides electrical and data communication. In yet other implementations, the communication member 208 provides data communication without electrical communication, such as via fiber optic cables.

In other implementations, first and second communication members 208 may be positioned in the determinative hinge assembly 106. The first communication member and second communication member may have one or more wires and/or cables extending between them or, in other implementations, a direct electrical contact between the first communication member and second communication member may allow electrical communication between the first communication member and second communication member. Data and/or electrical communication through the first communication member and second communication member may allow electricity and/or data to be sent across the determinative hinge assembly 106 between, for example, display (126, FIG. 1B) connected to the first portion 102 and one or more computing components connected to the second portion 104.

FIGS. 3A-3D show how an example determinative hinge assembly 106A can control when rotation occurs around individual hinge axes 116 (extending into and out of the page in the center of hinge pins 206. (The suffix ‘A’ is used relative to determinative hinge assembly 106A to convey that components of this determinative hinge assembly may or may not differ from other determinative hinge examples. To avoid clutter on the drawing page the ‘A’ suffix is not carried through to individual components).

FIG. 3A illustrates the determinative hinge assembly 106A in the closed (e.g., zero degree angle between the first and second portions 102 and 104) position. Note that in this implementation, individual cams 216 include a ‘high’ area 302 and a low or recessed area 304. In the closed position, the high area 302(2) of cam 216(2) contacts follower 214 and forces the follower into recessed area 304(1) of cam 216(1). At this point, rotation around first hinge axis 116(1) is blocked because follower 214 cannot move downward (e.g., away from hinge axis 116(1) and toward hinge axis 116(2)) and is instead ‘stuck’ in the recessed area 304(1). In contrast, rotation around hinge axis 116(2) can occur with follower 214 traveling across high area 302(2).

FIG. 3B shows a subsequent orientation of determinative hinge assembly 106A where rotation around the second hinge axis 116(2) has progressed until the angle between the first and second portions 102 and 104 is about 90 degrees. At this point, follower 214 is proximate to the recessed area 304(1) of cam 216(1) and thus there is space between the follower 214 and cam 216(2).

FIG. 3C shows rotation around hinge axis 116(1) rotating contact with follower 214 from recess area 304(1) to high area 302(1). This contact forces the follower away from hinge axis 116(1) and toward hinge axis 116(2) (e.g., into recess area 304(2) of cam 216(2)). As such, at this point, rotation can continue around hinge axis 116(1), but rotation is blocked around hinge axis 116(2).

FIG. 3D shows continued rotation around hinge axis 116(1) until the first and second portions 102 and 104 are 180 degrees apart. During this rotation from 135 degrees of FIG. 3C to 180 degrees of FIG. 3D, rotation around hinge axis 116(2) is blocked by follower 214 interacting with recess area 304(2) of cam 216(2) and the follower being locked by cam 216(1). The example sequences shown in FIGS. 3A-3D show how example determinative hinge assembly 106A can control rotation around individual hinge axes for ranges of angles between zero and 180 degrees. Viewed another way, for a first sub-range of the angles, rotation occurs around hinge axis 116(2) while rotation around hinge axis 116(1) is locked and for a second sub-range of angles, rotation occurs around hinge axis 116(1) while rotation around hinge axis 116(2) is locked. While the illustrated example has a range of rotation of 180 degrees, other implementations can control rotation for other ranges of rotation, such as by employing different cam patterns of high and recessed areas and or by employing multiple cams, such as one set to control rotation in a first range and another set to control rotation in a different range. Similarly, the illustrated cams and/or different cams can be used to control rotation in the opposite direction (e.g., counter-rotation).

FIGS. 4A-10D collectively show determinative hinge assembly 106 at specific degrees of relative rotation. These FIGS. collectively show how flexible member 222 can facilitate rotation and/or reduce a likelihood of device damage during rotation of the first and/or second portion 102 and 104. Rotation around the hinge axes 116 can be controlled by the determinative hinge assembly 106, such as by cams 216(1) and 216(2) in cooperation with follower 214(1) and cams 216(3) and 216(4) in cooperation with follower 214(3). Recall that the flexible member 222 secures the first body 202 relative to the first portion 102.

FIGS. 4A-4D show the first portion 102 and the second portion 104 defining a zero degree relative angle. In this orientation, the first surface 118 of the first portion is positioned parallel and generally against the first surface 122 of the second portion (e.g., closed book orientation). Further, in this implementation, the first surface 118 is parallel to the flexible member 222, which is in a non-flexed state. In the illustrated implementation, the flexible member is generally planar in the unflexed state and tends to be oriented parallel to the first and second surfaces. Further, the first body 202 is generally centered relative to the first portion 102 (e.g., generally equal spacing at 402 and 404 relative to the first surface 118 and the second surface 122).

FIGS. 5A-5D show the first portion 102 rotated forty-five degrees relative to the second portion 104. The rotation from the zero degree orientation to the forty-five degree orientation can occur around hinge pin 206(2) rather that hinge pin 206(1) as defined by cams 216(1) and 216(2) and follower 214(1). Also note that a region 502 of first surface 118 of the first portion is contacting a region 504 of second portion 104. Traditionally, this contact could damage either or both of first surface 118 and/or second surface 122. However, note that in this implementation, the contact can be mitigated by flexible member 222. Note that in the forty-five degree orientation the contact of the region 502 against the region 504 caused the flexible member 222 to flex from the planar configuration of FIGS. 4A-4D to a flexed configuration. In the flexed configuration, at least a portion 506 of the flexible member can transition from the non-flexed state. In this example, portion 506 is no longer parallel to first surface 118 and in some implementations can be characterized as being arcuate.

Comparison of FIGS. 4A-4D with FIGS. 5A-5D illustrates the ‘flexible’ nature of the flexible member 222 in this implementation. In this case, the flexible member is flexible yet semi-rigid. Viewed from one perspective, the flexible member can be flexible between the first end 224 and the second end 226, but more rigid in the transverse direction (parallel to the hinge axes). In some implementations, the flexible member can be manifest as a leaf spring that flexes along its length (e.g., between the first and second ends 224 and 226) when exposed to loads and then returns to its original configuration when the loads are removed.

Flexing of the flexible member 222 has allowed hinge end 108 of the first portion 102 to move away from the hinge end 112 of the second portion 104 as indicated at 508. This is evidenced by the increasing spacing at 402 and the decreasing spacing at 404. Allowing the hinge ends of the first and second portions to move away from each other can lessen contact forces imparted on regions 502 and/or 504 of the first and second portions 102 and 104.

FIGS. 6A-6D show additional relative rotation so that the first and second portions 102 and 104 are oriented at about 160 degrees to one another. At this point contact again occurs between region 502 of the first portion 102 and region 504 of the second portion 104 (the exact location of the contact has migrated somewhat from the 45 degree orientation). However, flexible member 222 continues to allow the first portion 102 to move away from the second portion 104 as indicated at 508. This movement is enabled by flexing at portion 506 of the flexible member 222.

FIGS. 7A-7D show additional relative rotation so that the first and second portions 102 and 104 are oriented at about 180 degrees to one another until they are abutting in an open book orientation. At this point, the stressful contact between regions 502 and 504 has ceased. Accordingly, the first portion is re-centered relative to the first body 202. Also, the flexible member 222 has returned to is non-flexed state with its portion 506 once again parallel to the first surface 118. In this orientation, the first and second portions can abut one another to create a nearly seamless display area as discussed above relative to FIGS. 1A-1C. However, without the flexible member 222 these abuting portions would tend to damage one another during rotation through the oblique angles of FIGS. 5A-5D and 6A-6D. Alternatively or additionally, without the flexible member 222 contact interference between the first and second portions can constrain further rotation (e.g., binding), which if the user applies more force to overcome could cause extensive damage to the device.

FIGS. 8A-8D show further rotation of the first and second portions 102 and 104 to a relative orientation of about 225 degrees. The rotation from the 180 degree orientation to the two hundred and twenty-five degree orientation occurred around hinge pin 206(1) rather than hinge pin 206(2) as defined by cams 216 and followers 214. Also note that once again region 502 of first surface 118 of the first portion 102 is contacting region 504 of second portion 104. Again, the contact can be mitigated by flexible member 222. Note that in the two hundred and twenty-five degree orientation the contact of the region 502 against the region 504 caused the flexible member 222 to flex from the planar configuration of the one hundred and eighty degree orientation to a flexed configuration. In the flexed configuration, at least portion 506 of the flexible member can transition from the non-flexed state. In this example, portion 506 is no longer parallel to first surface 118. Flexing of the flexible member has allowed hinge end 108 of the first portion 102 to move away from the hinge end 112 of the second portion 104 as indicated at 508. This is evidenced by the increasing spacing at 402 and the decreasing spacing at 404. Allowing the hinge ends of the first and second portions to move away from each other can lessen forces imparted on regions 502 and/or 504 and protect the first and second portions from damage.

FIGS. 9A-9D show additional relative rotation so that the first and second portions 102 and 104 are oriented at about 320 degrees to one another. At this point contact can occur between region 502 of the first portion 102 and region 504 of the second portion 104. However, flexible member 222 continues to allow the first portion 102 to move away from the second portion 104 as indicated at 508. This movement can decrease or limit forces between the first region 502 and the second region 504. This movement can be enabled by flexing at portion 506 of the flexible member 222.

FIGS. 10A-10D are similar to 4A-4D except the first portion 102 is now underneath the second portion 104 in what can be referred to as a three hundred and sixty degree relative angle. In this orientation, the second surface 120 of the first portion is positioned parallel and generally against the second surface 124 of the second portion. Further, the first surface 118 is once again parallel to the flexible member 222, which returns to the non-flexed state. Further, the first body 202 is once again generally centered relative to the first portion 102 (e.g., generally equal spacing at 402 and 404).

Individual elements of the determinative hinge assembly 106 can be made from various materials, such as metals, plastics, and/or composites. These materials can be prepared in various ways, such as in the form of sheet metals, die cast metals, machined metals, 3D printed materials, molded or 3D printed plastics, and/or molded or 3D printed composites, among others, or any combination of these materials and/or preparations can be employed.

The present determinative hinge assembly concepts can be utilized with any type of device, such as but not limited to notebook computers, tablets, smart phones, wearable smart devices, and/or other types of existing, developing, and/or yet to be developed devices.

Various methods of manufacture, assembly, and use for hinge assemblies and devices are contemplated beyond those shown above relative to FIGS. 1A-10D.

Various device examples are described above. Additional examples are described below. One example includes a device comprising a first portion and a second portion and further comprising a determinative hinge assembly that is secured to the second portion. The determinative hinge assembly further comprises a flexible member that is secured relative to the first portion. The flexible member is configured to flex when the first portion contacts the second portion at an oblique angle and to unflex when the first portion and the second portion are parallel to one another or perpendicular to one another.

Another example can include any of the above and/or below examples where the first portion comprises two planar parallel surfaces and where the flexible member is positioned between the two planar parallel surfaces.

Another example can include any of the above and/or below examples where the flexible member is planar and parallel to the two planar parallel surfaces when unflexed.

Another example can include any of the above and/or below examples where the flexible member is equidistant from the two planar surfaces when unflexed.

Another example can include any of the above and/or below examples where the flexible member is resiliently biased to the planar configuration.

Another example can include any of the above and/or below examples where at least a portion of the flexible member is not parallel to the two planar surfaces when flexed.

Another example can include any of the above and/or below examples where the flexible member is arcuate when flexed.

Another example can include any of the above and/or below examples where flexing of the flexible member allows the two parallel surfaces to move away from the second portion.

Another example can include any of the above and/or below examples where the device further comprises a first body positioned in the first portion and defining a first axis of rotation of the determinative hinge assembly.

Another example can include any of the above and/or below examples where the first body is only connected to the first portion via the flexible member.

Another example can include any of the above and/or below examples where a first end of the flexible member is secured to the first body and a second end of the flexible member is secured to the first portion.

Another example can include any of the above and/or below examples where the device further comprises a second body positioned in the second portion and defining a second axis of rotation of the determinative hinge assembly.

Another example can include any of the above and/or below examples where the first body defines a first cam and the second body defines a second cam.

Another example can include any of the above and/or below examples where interaction of the first cam and the second cam determine when rotation occurs around the first axis of rotation and when rotation occurs around the second axis of rotation.

Another example can include any of the above and/or below examples where the interaction of the first cam and the second cam is direct.

Another example can include any of the above and/or below examples where the interaction of the first cam and the second cam is accomplished via an interposed element.

Another example can include any of the above and/or below examples where the interposed element comprises a follower.

Another example can include any of the above and/or below examples where the flexible member allows a hinge end of the first portion to move away from a hinge end of the second portion at the oblique angles.

Another example can include a device comprising a first portion that includes a first display and a second portion that includes a second display. The device further comprises a determinative hinge assembly that is secured to the second portion. The determinative hinge assembly further comprises a flexible member that is secured relative to the first portion, the flexible member configured to flex when the first display contacts the second portion at an oblique angle during rotation of the first and second portions and to unflex when the first portion and the second portion are parallel to one another or perpendicular to one another.

Another example can include any of the above and/or below examples where the device further comprises a processor that controls the first and second displays and that creates separate graphical user interfaces on the first and second displays when the first and second displays are oriented at an oblique angle or right angle and creates a shared graphical user interface when the first and second displays are oriented at 180 degrees from one another.

Another example can include a device comprising a first portion that includes a first display and a second portion that includes a second display. The device further comprises a determinative hinge assembly that rotatably secures the first and second portions around first and second hinge axes and that has a first unflexed configuration when the first and second portions are parallel or perpendicular to one another and a second flexed configuration when the first and second portions contact one another when oriented at an oblique angle.

Another example can include any of the above and/or below examples where the determinative hinge assembly allows a range of rotation and where the determinative hinge assembly further controls that a first sub-range of rotation occurs around the first hinge axis and a second sub-range of rotation occurs around the second hinge axis.

Although techniques, methods, devices, systems, etc., pertaining to determinative hinge assemblies are described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not limited to the specific features or acts described. Rather, the specific features and acts are disclosed as example forms of implementing the claimed methods, devices, systems, etc. 

1. A device, comprising: a first portion and a second portion; and, a determinative hinge assembly that is secured to the second portion, and the determinative hinge assembly further comprises a flexible member that is secured relative to the first portion, the flexible member configured to flex when the first portion contacts the second portion at an oblique angle and to unflex when the first portion and the second portion are parallel to one another or perpendicular to one another.
 2. The device of claim 1, wherein the first portion comprises two planar parallel surfaces and wherein the flexible member is positioned between the two planar parallel surfaces.
 3. The device of claim 2, wherein the flexible member has a planar configuration and is parallel to the two planar parallel surfaces when unflexed.
 4. The device of claim 3, wherein the flexible member is equidistant from the two planar surfaces when unflexed.
 5. The device of claim 3, wherein the flexible member is resiliently biased to the planar configuration.
 6. The device of claim 3, wherein at least a portion of the flexible member is not parallel to the two planar surfaces when flexed.
 7. The device of claim 3, wherein the flexible member is arcuate when flexed.
 8. The device of claim 3, wherein flexing of the flexible member allows the two parallel surfaces to move away from the second portion.
 9. The device of claim 1, further comprising a first body positioned in the first portion and defining a first axis of rotation of the determinative hinge assembly.
 10. The device of claim 9, wherein the first body is only connected to the first portion via the flexible member.
 11. The device of claim 10, wherein a first end of the flexible member is secured to the first body and a second end of the flexible member is secured to the first portion.
 12. The device of claim 9, further comprising a second body positioned in the second portion and defining a second axis of rotation of the determinative hinge assembly.
 13. The device of claim 12, wherein the first body defines a first cam and the second body defines a second cam.
 14. The device of claim 13, wherein interaction of the first cam and the second cam determine when rotation occurs around the first axis of rotation and when rotation occurs around the second axis of rotation.
 15. The device of claim 14, wherein the interaction of the first cam and the second cam is accomplished via an interposed element.
 16. The device of claim 1, wherein the flexible member allows a hinge end of the first portion to move away from a hinge end of the second portion at the oblique angles.
 17. A device, comprising: a first portion that includes a first display and a second portion that includes a second display; and, a determinative hinge assembly that is secured to the second portion and the determinative hinge assembly further comprises a flexible member that is secured relative to the first portion, the flexible member configured to flex when the first display contacts the second portion at an oblique angle during rotation of the first and second portions and to unflex when the first portion and the second portion are parallel to one another or perpendicular to one another.
 18. The device of claim 17, further comprising a processor that controls the first and second displays and that creates separate graphical user interfaces on the first and second displays when the first and second displays are oriented at an oblique angle or right angle and creates a shared graphical user interface when the first and second displays are oriented at 180 degrees from one another.
 19. A device, comprising: a first portion that includes a first display and a second portion that includes a second display; and, a determinative hinge assembly that rotatably secures the first and second portions around first and second hinge axes and that has a first unflexed configuration when the first and second portions are parallel or perpendicular to one another and a second flexed configuration when the first and second portions contact one another when oriented at an oblique angle.
 20. The device of claim 19, wherein the determinative hinge assembly allows a range of rotation and wherein the determinative hinge assembly further controls that a first sub-range of rotation occurs around the first hinge axis and a second sub-range of rotation occurs around the second hinge axis. 